8 problems

Huang’s universality conjecture. The leading transcendental terms of tree-level string amplitudes are universal.

D’Hoker–Green conjecture. The general form of the non-analytic part involves only numbers of the type $Z^{\mathrm{DG}}_m-Z^{\mathrm{DG}}_n$, the combinations…

Let the low-energy expansion of the genus-one four-graviton amplitude be organized by derivative order, and assign transcendental weights to the constants and functions appearing i…

Let $\widehat{\cal I}^{(4,0)}_{1234}(s_{ij},\tau)$ be the closed integral form introduced for the modular-weight $(4,0)$ quantity associated with the four-point heterotic-string am…

Degree-four universality conjecture. The two-loop remainder of every minimal form factor has the same degree-four part as the BPS one.

A master integral is one of the finitely many basis integrals to which the integrals of a topology reduce through integration-by-parts identities. A master integral is uniformly tr…

Consider an $L$-loop amplitude in dimensional regularisation with $D=4-2\epsilon$, and write its Laurent expansion in $epsilon$. Maximum-transcendentality conjecture. The Laurent c…

Maximal transcendentality conjecture. MHV amplitudes at $L$ loops can be expressed as sums of polylogarithms of transcendentality $2L$.